The mode cut-off thicknesses and effective refractive indices offundamental modes in waveguide layer are calculated. And mode absorption coefficientsin waveguide layer, biffer layer and absorption layer are also computed.

• 用这些方程计算了波导层模式的截止厚度和基模的有效折射率，以及波导层、缓冲层和吸收层模式的模吸收系数。